difficult problem with DNS and Mail

[Chad M. Stewart]

At 10:26 PM 07/20/2001, Kevin Darcy wrote:

Kevin - thanks for your response to my ealier post.


>You can call the nameserver anything you want. Just make sure you keep the 
>nameserver
>name(s) and address(s) in synch between what you publish from the zone and 
>what your
>registrar provides to the TLD servers. Otherwise you're asking for trouble 
>-- you too
>could join the ranks of the loathed and despised delegation-botchers :-).

I was one of those for about a week, that won't happen again!  Most times I 
only have to be told once. :)



>As for "mailhub" (or, more accurately, MAIL_HUB), see the cf/README file 
>in the
>sendmail distribution for the basic rundown of how it works and how to 
>configure it.
>If you have more complex requirements, you may want to go to something like
>mailertables, virtusertable or LDAP-based routing instead. But it sounds 
>like all you
>need is a "punt" for inbound mail.

Gary -- Try this

On the Internet system see if you have mailertables enabled in your 
sendmail.cf file.  In that file put something like

thought.org     smtp:inside.host.here

Also in the access.db put

thought.org     RELAY


Then make the internal system know that user at thought.org is local and I 
think you'll have what you want.


Regards,
Chad



>- Kevin
>
>Gary Kline wrote:
>
> > On Fri, Jul 20, 2001 at 07:33:45PM -0400, Kevin Darcy wrote:
> > >
> > > This is really more of a mail server question than a DNS question. In 
> DNS terms,
> > > your mail (MX record) would be pointed to fubar. Then fubar would 
> forward the
> > > mail to tao through the firewall. If fubar is also being used for 
> outbound mail,
> > > then you'd probably want to go with a "mailhub" type of sendmail 
> configuration,
> > > i.e. where all "local" addresses are forwarded to some other box. I'm 
> not really
> > > up-to-date on how to do that, since we've had separate servers for 
> inbound and
> > > outbound mail for a number of years, and that's a somewhat different
> > > configuration...
> > >
> > >
> >
> >         Hm...  One thing I'm wondering about is: wwould I have to
> >         bother switching my interNIC  registery?   It might be
> >         vastly simpler to make *this* (TAO) 249 and FUBAR 248;
> >         then FUBAR  could be my new NS1.THOUGHT.ORG as it is
> >         currently in Network Services' records.
> >
> >         Any pointers to the `mailhub' config would be welcome.
> >         DNS AND BIND reads like a novel ;  the big blue sendmail
> >         tome gives me the shivers :-)/2.